1) shielding principle
屏蔽原理
2) electromagnetic shield theory
电磁屏蔽原理
4) shield lemma
屏蔽引理
1.
Via the new concepts of sunny facets,shady facets and flat projective facets of a convex polytope to an outer point and two shield lemmas,it is proved that any n-polytope in Rn can be dissected into a finite union of n-simplices with the vertices coincide with the original polytope and no pair of small simplices has an interior point in common.
通过引进凸多胞形对其外部一点的阴面、阳面与平射面等概念,借助两个屏蔽引理证明Rn中任何n维凸多胞形都可以剖分为内部互不相交、以原凸多胞形的顶点集的子集为顶点集的有限个n维单纯形之并,克服了相关文献中剖分的不足,为单纯形算法提供了一种比较理想的剖分工具。
补充资料:超导磁屏蔽(superconductingmagneticshield)
超导磁屏蔽(superconductingmagneticshield)
处于超导态的厚壁多连通超导体,若原先空腔中无磁场存在,在外加小于临界磁场的磁场后,由于有产生逆磁的屏蔽环电流而磁场不能进入腔内,起到磁场屏蔽的作用,称超导磁屏蔽。例如对空心超导圆柱体,则磁场不能进入圆柱空腔,况且,即使圆柱壁厚d≤λL,只要内半径`r\gt\gt\lambda_L`,也可起到屏蔽磁场进入空腔的作用。这里λL是伦敦穿透深度。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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